From: DougAtHome (dcalton@fuse.net)
Date: Sat Apr 05 2003 - 20:22:40 GMT-3
This all surprizes me. Firstly, I would presume that Jeongwoo's
configuration would NOT work, and that broadcast is required for these
components. In my labs, after a reboot, the config would definitely fail
without the broadcast - if not immediately, then definitely after clearing
inarp.
Secondly, I have never seen samples where spoke to spoke maps eliminated the
"broadcast" keyword. My understanding is that the broadcast first allows
broadcast messages to be sent across the frame network. Secondly, where
necessary, the router emulates broadcast behavior by sending out duplicate
messages out all dcli's referenced to that subinterface.
I don't know if I will have time to lab this out (my first attempt for the
lab is now 3 weeks away), but would be interested in some
clarification/explanation. Thanks!
-----Original Message-----
From: Jeongwoo Park [mailto:jpark@wams.com]
Sent: Saturday, April 05, 2003 4:51 PM
To: 'ccielab@groupstudy.com'
Cc: 'Brian Dennis'
Subject: RE: Frame map ip
Thanks a lot for clarifying this.
Now I am converting this;
R2:Hub router
interface Serial0/0.234 multipoint
ip address 120.20.234.2 255.255.255.224
ip ospf network point-to-multipoint
frame-relay map ip 120.20.234.3 203 broadcast
frame-relay map ip 120.20.234.4 204 broadcast
To;
R2
its answer;
interface Serial0/0.234 multipoint
ip address 120.20.234.2 255.255.255.224
ip ospf network point-to-multipoint
frame-relay interface-dlci 203
frame-relay interface-dlci 204
I am not getting different result.
R2#frame map
Serial0/0.234 (up): ip 120.20.234.4 dlci 204(0xCC,0x30C0), dynamic,
broadcast,, status defined, active
R2#
I get only one map result. Shouldn't I get two of this?
R4:Spoke Router
interface Serial1/0
ip address 120.20.234.4 255.255.255.224
encapsulation frame-relay
ip ospf network point-to-multipoint
frame-relay map ip 120.20.234.2 402 broadcast
frame-relay map ip 120.20.234.3 402 broadcast
R3:Spoke Router
interface Serial1/0.234 point-to-point
ip address 120.20.234.3 255.255.255.224
ip ospf hello-interval 30
frame-relay interface-dlci 302
-----Original Message-----
From: Brian Dennis [mailto:brian@labforge.com]
Sent: Saturday, April 05, 2003 12:36 PM
To: 'Jeongwoo Park'; ccielab@groupstudy.com
Subject: RE: Frame map ip
Maybe there was a requirement to enable the router to ping itself.
As a side note the broadcast keyword isn't needed and is actually causing
duplicate broadcast packets to be sent to "120.20.234.3". When spokes map to
other spokes the broadcast keyword is useless because to hub will absorb the
broadcast.
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
Director of CCIE Training and Development - IPexpert, Inc.
Mailto: brian@ipexpert.net
Toll Free: 866.225.8064
Outside U.S. & Canada: 312.321.6924
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Jeongwoo Park
Sent: Saturday, April 05, 2003 11:48 AM
To: 'ccielab@groupstudy.com'
Subject: Frame map ip
Hi all.
I am doing ccie practice lab scinerio. I found a interesting answer about
frame relay map.
its answer;
interface Serial0/0.234 multipoint
ip address 120.20.234.2 255.255.255.224
ip ospf network point-to-multipoint
frame-relay map ip 120.20.234.2 203 broadcast
frame-relay map ip 120.20.234.3 203 broadcast
frame-relay map ip 120.20.234.4 204 broadcast
As you can see, why would you want to have map frame to your own interface
ip address? Can anyone of you explain this?
Thanks a lot,
JP
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